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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14176) Replace incorrect use of system property user.name
Date Wed, 20 Mar 2019 19:34:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16797479#comment-16797479
] 

Hudson commented on HDFS-14176:
-------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #16251 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/16251/])
HDFS-14176. Replace incorrect use of system property user.name. (ajay: rev 399563fec607a8c2ddc5d1a46b94a60389bef68c)
* (edit) hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterClientProtocol.java
* (edit) hadoop-tools/hadoop-openstack/src/main/java/org/apache/hadoop/fs/swift/snative/SwiftNativeFileSystem.java


> Replace incorrect use of system property user.name
> --------------------------------------------------
>
>                 Key: HDFS-14176
>                 URL: https://issues.apache.org/jira/browse/HDFS-14176
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.3.0
>         Environment: Kerberized
>            Reporter: Wei-Chiu Chuang
>            Assignee: Dinesh Chitlangia
>            Priority: Major
>         Attachments: HDFS-14176.01.patch, HDFS-14176.02.patch, HDFS-14176.03.patch, HDFS-14176.04.patch
>
>
> Looking at the Hadoop source code, there are a few places where the code assumes the
user name can be acquired from Java's system property {{user.name}}.
> For example,
> {code:java|title=FileSystem}
> /** Return the current user's home directory in this FileSystem.
>    * The default implementation returns {@code "/user/$USER/"}.
>    */
>   public Path getHomeDirectory() {
>     return this.makeQualified(
>         new Path(USER_HOME_PREFIX + "/" + System.getProperty("user.name")));
>   }
> {code}
> This is incorrect, as in a Kerberized environment, a user may login as a user principal
different from its system login account.
> It would be better to use {{UserGroupInformation.getCurrentUser().getShortUserName()}},
similar to HDFS-12485.
> Unfortunately, I am seeing this improper use in Yarn, HDFS federation SFTPFilesystem
and Ozone code (tests are ignored)
> The impact should be small, since it only affects the case where system is Kerberized
and that the user principal is different from system login account.



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